# Unit Converter Pro Max vs SI Converter

The clearest difference is iOS requirement: Unit Converter Pro Max at 11.0 against SI Converter's 17.2. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Unit Converter Pro Max | SI Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | — | Every 2 months |
| Size | 28 MB | 4 MB |
| Requires iOS | **11.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ferran Espuna](https://appshunter.io/developer/1608027657) | [Ramon A. Marchante Castellanos](https://appshunter.io/developer/1735326162) |

## What reviewers say

### Unit Converter Pro Max

[App page](https://appshunter.io/ios/app/unit-converter-pro-max/id6446093703)

**Features:** macOS Compatibility

**In-app purchases:** none


### SI Converter

[App page](https://appshunter.io/ios/app/si-converter/id6504356195)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter Pro Max free?

Unit Converter Pro Max is free to download, with no in-app purchases.

### Is SI Converter free?

SI Converter is free to download, with no in-app purchases.

### Do Unit Converter Pro Max or SI Converter have ads?

Both Unit Converter Pro Max and SI Converter show ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*